Sand mold



Nov. 17 1925.

SAND OLD Enea sein. ze. 192s 4 Sheets-Sheet 1 Nov. 17, 1925- T. A. HUGHES SAND IOLD Filed Supt. 28.

1923 4 Sheets-Sheet 2 Mis- NIMMN T. A. HUGHES snm uom rund sept. 28. 1923 4 Sheets-Sheet :5

Nov. 17

. 1,561,720 T. A'. HUGHES slmn uoLb Filod Sopt. 28. 1925 4 Sheats-5heet 4 Patented Nov. 17, 1925.

UNITED STATES 1,561,720 PATENT OFFICE.

THOMAS A. HUGHES, OF CHICAGO, ILLINOIS, ASSIGNOR TO WOLFF MANUFACTURING CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SAND MOLD.

Application tiled September 28, 1923. Serial No. 665,264.

To all whom z5 may cof/zoem.'

Be it known that I, THOMAS A. HUGHES, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Sand Molds, of which the following is a specification.

This invention relates to the art of molding, and has more particular reference to the art of forming molds wherein the mold parts, because of the shape of the article, have in the past required an angular draw and assemblage to provide the necessary clearance for separation and assemblage. An example of such an article is an apron bath tub wherein a vertically arranged integral apron extends from the rim of the tub to the floor and is waved across the height of the apron to improve the appearance.

The particular embodiment of the .invention hereinafter described, for the purposes of illustration, relates to such a tub, but it will be manifest that the invention has other and general application.

Because of the general vertical arrangement of the apron, the waving of it, of necessity, disposes parts of both'the inner and outer faces upon both sides of the vertical and a tilting of the tub is required to permit the drawing of the sand molds where flasks are used, in accordance with the usual practice prior to my invention. The apron in tubs of this character provided for corner installation extends around the exposed corner of the tub and this has required tilting of the iiask parts at an angle to the vertical in two directions as will be readily understood. My invention contemplates the separation of certain mold parts or walls to render this angular draw unnecessary, particularly where the walls define outer faces of the sand body, although it will be manifest that by modification similar provision could be provided for the walls having internal surface forming function.

The invention has for its principal object the accomplishment of this result in the molding of bath tubs and other articles, in simple, practical, effective fashion.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, when taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.

On the drawings,

Figure l is a top plan view of the cope pattern for a bath tub, in which my present invention is embodied;

Fig. 2 is a longitudinal vertical sectional view through the same, showing the tub body pattern in place;

Fig. 3 is an end view thereof looking from the right in Fig. 1;

Fig. 4 is a partial side view, looking from the bottom of Fig. 1; and

Fig. 5 is a side elevation of the cope and drag.

The cope pattern shown on the drawing comprises a main body 11 in which is positioned a reversible tub body pattern portion 1 2. The main body consists of two side portions 13 and 14, and two end portions 15 and 16, all integral. Central webs 17 and 1S are cast with the body as are also six I-bean'i wrapping blocks 19. The pattern of the drawings is for the construction of an apron tub for a left hand corner and two walls 21 and 22 are provided to extend up and form the outer faces of the sand mold which, when assembled with the drag, produce the inner surface of the apron at the end and side. The contour, or waving, of this apron can be observed in Figs. 2 and 4, as indicated at a. It will be noted that the molded sand between the tub portion 12 and the wall a cannot be drawn vertically upward viewing these figures, while the parts are arranged as shown. I have provided for the outward removal of the walls 21 and 22 from sand forming position to permit this vertical draw.

At the bottom of the wall 21, two brackets 23 and 24 extend in beneath the bottom of the pattern and pivot-ally engage a shaft 25, mounted in bearings 26 and 27 extending down from the underside of the pattern. Three similar brackets 28, 29 and 31 extend in from the wall 22 beneath the pattern and similarly engage a shaft 32 carried in similar bearings 33, 34 and 35. Since the apron extends around the corner b, the adjacent ends of the walls are curved and brought into close arrangement at 36 and the shafts and 32 are spaced in from the sides of the ask at their adjacent ends to give an angular swing to the wall away from the formed sand mold. Wedge lugs 37 and 3S and 39V are provided to receive wedge clamps and hold the walls in operative position. i; wedge lug 38 and a wedge lug 39 are mounted respectively on upstanding posts 4]. and 42, secured at their bottom to the pattern body.

Means are provided for controlling the opening movement of the walls 21 and 22. These means comprise screw shafts 43 and 44 rotatably mounted in lugs 45 and 46 upon the outer ends of the wa is 2land and threadedly engaged in lugs 47 and 48 on the posts 42 and 4i, the lugs 45, 4G, 4i', and 48 being swiveled.

Reference character 60 indicates the cope proper and it will be noted that this cope is provided with two side lugs 6l and 62 adaptedito` register with side lugs G3 and 64 on the body of the pattern. The lugs 63 and 64 have holes 65 to receive registering pins 66 and, since the cope is to be drawn ofi' the pattern in a: vertical direction, these pins extend vertically andV through holes G7 vertically disposed through the cope lugs 6l and 62. The cope, in the present instance, is adapted forangular assembly on the drag and to be centered thereon through the utilization of `similar pins. ltwill be manifest that thesepinsl of the. drag must present an angularV arrangement with respect to the cope in assembly and accordingly angular openingsV 68 are provided inthe lugs 3l and 62 to receive the drag. pins thus presented.

In operation, the sand is compressed between the pattern body l2 and the walls 21 and 22 when thelatter are clamped in the position shown in the drawings. Said walls are then swung, away, the.. screw shafts 43Y and 44 beingjturned to allow said walls to be moved asufiicient distance to permit vertical draw of the mold. rlhe cope proper 60 Vmay also be vertically drawn and is adapted, by reason of the angular openings G8, to be angularly assembled with the drag inmuchy the sameimanner as that disclosed in my copending application Serial No. 6G5,- 263,filed September 28, i923.

lt is thought that the invention and many of its attendant advantages will `be understood from the foregoing description, and it will befapparentthatvvarions changes may be-made in the form, construction and arrangementof the parts without departingr from the vspirit and scope of the invention er sacrificing` all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

l. A flask member for use in forming sand molds having one or more outer walls formed tol give a shape to the sand body rendering difhcult verticalV draw thereof, said one or more outer Walls being mounted for movement away from said sand body prior to the drawing operation.

2. A flask member for use in forming sand molds having one or more outer Walls formed to give a shape to the sandbody rendering difficult vertical draw thereof, said one or more outer walls having an independent lateral movement away from the sand face or faces formed thereby.

ifi fiasl; pattern for use in forming molds requiring ordinarily an angular draw and having sand face defining walls movable laterallyV away from the sand faces formed thereby to permit vertical draw.

4. fr flask pattern for use in forming molds requiring ordinarily an angular draw and having a sand face defining wall movable .laterally away from the sand face formed thereby to permit vert-ical draw..

5. il flask pattern foruse in forming molds for bath tubs having vertical apronswaved transversely, comprising. an'vapron face-defining wall removable fromn faceforming' position to permit vertical draw.

6. fr flash pattern for use in forming molds for bath tubs having vertical apronswaved transversely and extendingY about 'twoadpicent sides, comprising walls defining the fates of said aprons, each of said walls being removable from face-forming position to permit vertical draw.

7. fi mold member adapted to form the interior face determining surfaceofa sand( bod the wall determinino` said face beine'` movable away therefrom to facilitate the vertical draw of the sand body.

S. A mold member adapted to form the interior face determining surface of -a sand body, the Vwall determining said face being movable about a pivoted axis beneath saidl face to facilitate vertical draw of the sand body.

9. A mold member adapted to form the interior face determining surface of afsand: body, the wall determiningl said face being movable about a pivotal axis out of parallelism with the plane of said wall Vto facilitate vertical draw of the sandv body.

l0. A mold member having sand -face-de teimining walls extending around a round-V ed corner and individually movable away from said facettev facilitate vertical draw of the sand body.

il. 'mold member having sand face-determining walls extending around a round-- ed corner and individually movable away from said face to facilitate vertical draw-of the sand body, and means detachably se, curing adjacent ends of said walls when-in operative position.

i2. fi mold member, comprising. a sand racedetermining wall movable away from a sand face formed thereby to facilitate vertical draw, and means for controlling the movement of said wall.v

llO

13. A mold member adapted to form adjacent side Wall i'aces of a sand body, the wall forming members being movable from said sand body and each other upon an obtuse angle.

14. A mold member adapted to form adjacent side Wall faces of a sand body, the Wall forming members being movable away from the sand faces formed thereby, means detacliably securing said Walls together at adjacent ends, and means controlling the movement of each Wall.

15. A flask member adapted to form adjacent side Wall faces of a sand body, the Walls being movable away from the sand itaces formed thereby, means detacbably securing said Walls together at adjacent ends, and means controlling the movement of each Wall located at the other ends of said Walls.

16. A cope and cope pattern for use in forming a sand mold requiring normally angular assembly with a companion drag, said pattern being adapted to permit vertical draw, and guiding means for guiding the cope vertically off the pattern and adapted to guide the cope angularly onto a drag.

17. A cope member adapted to receive and be freed from vertical arranged guide pins of its pattern, and having receiving means for engaging and assembling upon angu- 30 larly arranged guide pins of its drag.

THOMAS A. HUGHES. 

